Ornamental seam sewing machine



3 Sheets-Sheet l dbbo': wma

Feb. 2, 1932. F. M. CARD OHNAMENTAL sEAM SEWING @CHINE Filed June 9,1930 Feb. 2, 1932. F. M. CARD ORNAMENTAL SEAM SEWING MACHINE 5Sheets-Sheet 2 Filed June 9, 1950 Feb. 2, 1932. F. M. CARD ORNAMENTALSEAM SEWING MACHIE Filed June 9. 1950 3 Sheets-Sheet 5 Patented Feb. 2,1932 i UNITED .1s raras P ATSENTtorri-cn 'A FREDERICM; CARD, koniseinem@om.;.commentaire` AssIeNoR/uio mitnsin-annimmt:-

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JERSEY Vj ORNAMENTALf-SEAM SEWING' VIlAGI-IIjNZll 'ApplicationfiledfJun-e',y l), l1930. Serialio. 459.8575. l

This invention relatesv to improvementsgin ornamental seam sewing`machines and. has for its primary objectto increase, in a simplemanner, the range of production ofmachines of this type. y

The object and advantages in View,` together with `:means whereby thesame mayy be carried into effect, will best be understood from theollowingdescription of a preferred embodiment thereof illustrated intheaccompanyingvdrawings, in which f I Fig. 1 is a Vrearside elevation,partly in section, of' theimprove-d ornamental seam vsewing machine 2 isa bottom plan view of 13 the machine-base and work-supporting arm.

Figx is ak'transverse ,section of the worksupporting Yarm adj acentthestitching point. 'Eig 4 isatop plan view of a produced by the presentmach-ine.y 3F ig. 5 isa horizontal section .of a portion of the machinebracket-l Y arm, illustrating, .in top planvieiv,` the needlebar4controlling mechanism and omitting the A oil-guardbracket;V Fig. 6 isVaperspective view, partly in section, of the needle-positioncontrolling mechanism. Y. Referring to the. drawings, the sewinginachine hasa frame comprising a base 1 from `which projectsV aworkrsupporting yarm Rising ronnthe basel is "thesta'ndard Bgoi atubular bracket-arme, overhanging, arm 2 andterminating in a head 5,

Journaledin the bracket-arm vis a main actuating shaft 6 carrying atitsouter end a combined belt-pulley `and 'balance-Wheel 7,

the

andiatv its oppositeend a crank-disk 8 con;r

Y nectedinthe usual' manner by means 'of a link'9 with a needleb'ar 10,carrying ajneedle 11. The needle-barlO is journaledfor end- Wise,substantially vertically "reciprocatory movements in suitable bearingsprovided in a swinging frame l`2piv'otally .supported at its upper endupon a` fulcrumfpin 13 secured inthehead 5to provide aframe-axistransverse to the axis ofV rotation of 'theg'fmain shaft-,6."f Y f yCooperating with'theneedle 1l 'in the formation of lock-stitchesis aflooptalzer ltyoi: the rotary hook type and l carriedjby ashortshaft15 j ournale'd 'in the free end lofthe-w'irlsupporting arm 2 so asto-be disposed transversely ofthe lpath of needle vib1atio1i.f""l`zheloop-taker shaft 15 vcarries .a bevelgear 16' in ineshwitha similargearl 17 uponone end of lshaft22 is a crank-*armV 124' carryingapivotblock 25 slidingly :disposed infa suitable slot provided inafeed-barQf, upon whichfeed-` bar is secured Ya feed-"dog -27 operatingfree-end of the arm 2.

machine is actuated in Va Well .kno-wn manner to receive only onecomplete lrocking move` ment for three complete rotations `of the'Vmain-shaft 6, so thatfthe feed-dog 27is1p`1zo- 'jected above thethroat-platefonce only dur:-v

ing three Ycomplete kneedle reciprocations'.

' Theactuating lmechanism ofthe rock-shaft 22 is disclosedfor instance,in the UQS.:Pat?k ent of W. Myers,A No.v 1,825,684, n Sept. '295 hrougha throat-platef28'secured upon the Y i The feed-lift roek-shaft'QQ ofthepresent f and" 1931, andcomprises, in generahfa crank-arm i 29clamped upon thexrock-shaftglZQand 'conv nected by a link 30 witha'rockflever' 31 fulcrumed upon the machine'bracketfarm. IThe rock-lever31 carries al roller `32`tracking ,a

suitably shaped camgroo've 33 rprovided in the inner face of a camdisk,84 fixed upona rotary shaft 35, journaled in thebracket-arm 4 belowan'ddisposed transversely olffthe main-shaft'@ The cam-shaft 35 carriesaspiral gear '36 driven by a similar but smaller gear? fixed uponthemain-shaft 6f,t he pro# portions of the gears 36 and 37 being such thatthe, cam-'shaft 35 is rotated'. once only for` three" rotations ofthemain-shaftgjl K Y L'IolV impart workl'advaneingfand return lmovements tothe feed-dog 27,"the'feedbajr .2.6 is'fpivotally conn'eotedwith a'crank-,arm

38 ofV a 'eedro'ck-'shaft ourna-ledin* bearlil' ings provided in a lug40 within the worksupporting arm 2 and a lug 41 within the machine basel. Suitab'ly clamped upon the feed shaft 39 is a crank-arm 42 connectedwith a pitman 43 of which the upper end has a strap embracing aneccentric 44 adjustably secured in the usual manner u )on the mainshaft6.

The swinging needle-bar frame 12 is pivotally connected with one end ofa vibratory member 45 of which the opposite end has an offset arm 46resting upon a cam 47 carried by the transverse cam-shaft 35.v As morefully disclosed in theV before mentioned patent of W. Myers, No.1,825,634, the'arm 46 of the vibratory member 45 is yieldinglymaintained in contact with the cam 47 by means of a spring 48 coiledabout a vertically disposed rod 49 of which the lower end is pivotallyconnected with the member 45. The tapered upper end of the rod 49 isguided by and has sufficient clearance within a bushing 50,adjustably'threaded into an aperture in the bracket-arm 4, to providefor the relatively short, lateral vibrations imparted to the lower endof the rod by the needle jogging movements of the member 45. Preferablya swiveLwasher 5l is Vinterposed between the upper end of the spring 48and the lower end of the bushing 50.

The cam 47 imparts lateral vibratory movements to the member 45 aboutits pivotal connection with the swinging frame l2. These vlateralmovements of the member 45 are in part converted into endwisereciprocatory movements thereof by a fulcruming device for said memberconsisting of a link 52 pivot-ally connecting the member with ashouldered fulcrum-bolt 53 carried by an arm 54 suitably secured upon anadjusting shaft 55. The shaft 55 is substantially parof the member 45 tobe. in part converte-d in an apertured bearing-boss 56 provided at therear Vside of the bracket-arm 4. In the operation of the machine, thepoint of pivotal connection 52 of the link 52 with member 45 swings inan arc about the bolt 53 when the member is vibrated by the cam 47.llVhen the fulcrum-bolt 53 is located in an imaginary line connectingthe axis of the cam-shaft 35 and the point of pivotal connection of themember 45 with the needle-bar frame, the swinging movements of the link52 about the fulcrum-bolt 53 cause no appreciable endwise movement ofthe member 45 and consequently the needle-bar reciprocates vertically ina central or neutral path. However, when the fulcrum-bolt 53 ispositioned either above 'or below said imaginary line,

there develops a component of motion of thel link 52 which causes thelateral vibrations of the member 45 to be in part converted into endwisemovements thereof vwhereby jogging movements .are imparted to theneedle-bareither to the left ortothe right of said neutral path of theneedle-bar dependent upon whether the fulcrum-bolt is disposed above orbelow said imaginary line.

The mechanism hereinbefore described is embodied in commercial machinewell known in the art and it was the prior practice to provide manuallyoperated means for swinging the fulcrum-bolt 53 into fixed positionsdetermining the desired extent of needle-jogging movements at theselected side of said neutral position. ln accordance with the presentimprovement, there is provided an actuating mechanism which maybeconveniently coupled with the fulcrum-bolt adjusting means forautomatically changing the field of needle-jogging movements from oneside to the other of the neutral position of the needle 'alternatelywith pairs of successive reciprocations of the needle in its neutralpath of non-vibration. rThe feed-lift only between the successivereciprocations of the needle in said neutral path. To this end, a pinion57 is secured upon the end of the cam-shaft 35 projecting rearwardlybeyond its bearing in the bracket-arm, which pinion is in mesh with aspur-gear 58 carried by a stub-shaft 59 ournaled in a bearing apertureprovided in a bracket 60 secured upon the rear side of the machinebracket-arm 4. In the present machine, the bracket 6() has at one end anapertured boss 6l mounted upon a reduced extension 62 of thebearing-boss 56 and secured thereupon by a screw 63. At its oppositeend, the bracket 60 is connected by a shoulder bolt 64 to a supportingbar 65 secured by a screw 66 upon the bracket-arm 4. Detachably fastenedto the under side of the bracket 60 is a segmental oil-guardbracket 67.

Suitably secured upon the spur-gear 58 is a cam-disk 68 having in itsrear face a camgroove 69, the ratio of the gears 57, 58 being such thatthe cam-disk 68 is rotated at one half the speed of rotation of thecam-shaft 35, i. e., atone sixth the speed of rotation of the main-shaft6. The cam-groove 69 is entered by a cam-roller 70 carried by avibratory arm 7l having its hub 72 journaled upon the bracket-securingbolt 64. The vi- Y bratory arm 7l is provided with a fork 7 3 embracinga pivot-block 74 carried by an arm 75 of an elbow-lever 75, 76 havingits hub 77 loosely journaled upon the adjusting shaft 55, i. e., upon anaxis coincident with the axis of the shiftable fulcrum-bolt Thelever-hub 77 is disposed between a shaft collar 78 and the hub 79 of anadjusting-arm 8O suitably secured upon the shaft 55. The

adj Listing-arm 80 has an apertured 8l adapted "'f' to be entered, inthe alined position of the parts. by a coupling pin 82, shiftablydisposed .in the aperture'd free end of the leverarm 76 and securedtherein by a set-screw 83.

The vadjusting-arm 8O has a laterally bent v actuating mechanism istimed to be effective ies free end 84 overhanging a segmental eXtension85 of the bracket 60. Threaded intothe overhanging end 84 of theadjusting-arm is a securing screw 86, which may be employed to lock theadjusting-arm to the stationary bracket-segment 85, in differentselected psitions of said arm when the coupling pin 82 is withdrawn fromthe adjusting-armaperture 8l. Consequently, the machine may be employedas'heretofore, in effecting the production of lateral and returnstitches at one ing said lever to thereby determine different paths ofneedle reciprocation, and means for ladjustably securing said adjustingshaft against movement in the disconnected condition of said couplingmeans.

In'testimony whereof I have signed my named to this specification.

Y FREDERIC M. CARD.

or the other side of the neutral position of the needle and in thenon-feeding position of the feed-dog, it being understood that with thepresent timing of the parts, the feed-dog advances the work only betweensuccessive reciprocations of the needle while position.

`When it is desired to employ vthe vherein described mechanism forVautomatically con-v trolling the adjustment of the position of thefulcrum-bolt 58, the adjusting-arm scouring screw 86 is released fromengagement with the bracket segment 85 and the level'- arm 76 isconnected with the adjusting armA 80 by means of the coupling pin 82. Asthus operatively connected with the cam-actuated.

arm 7l, the adj Listing-arm 8Ov is intermittently shifted to change thepositions of the fulcrum-bolt 53, whereby a seam as indicated in Fig. tof the drawings is produced by the stitch-forming mechanism. By changingthe relat-ive timing of the parts, it is evident that several variationsmay be effected in the ornamental seam produced.

Having thus set forth the nature of the able support for said link, anarm carried by said adjusting shaft, a lever fnlcrumed upon an axiscoincident with the axis of the adj usting shaft, coupling meansconnecting said lever and the adj Listing-shaft arm. and means foractuating said lever to intermittentlyk shift said link-support in adirection crosswise of the needle-jogging member.

2. In a sewing machine, a reciprocatory needle-carrying bar, a rotaryneedle-reciprocating shaft operatively connected With said bar, acam-shaft disposed transversely of the needle-reciprocating shaft, aneedle-jogging member actuated from said cam-shaft,V a

swinging link pivotally connected with said member, an adjusting-shaftcarrying a shiftable support for said link, a'needle-jogging membercontrolling lever, means for disconnectibly coupling said lever and saidadjusting-shaft, means for intermittently rockin its neutral YCRTIFICATE or ooRREcTIoN'.

Patent No. 1,843,896. Granted February 2, 1932, to

FREDERIC M. CARD.

lt is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 2,line 42, strike out the words "of the member 45 to be in part converted"and insert instead the syllable and words allel with the cam-shaft 35and is journaled, and line l25, for "apertured" read aperture; page 3,line 72, for "named" read name; and that the said Letters Patent shouldbe read with these corrections therein that the same may conform to therecord of the case in the Patent Office.

Signed and sealed this 29th day of March, A. D. 1932.

M. J. Moore,

(Seal) Acting Commissioner of Patents.

